Wood-type metal golf club head and process for producing the same
US5135227A · kind A · utility
31Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1991 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Aug 27, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S273/07
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A wood-type metal golf club head comprising a hollow metal head body and a core material filling the inside of the metal head body, wherein the core material is an aggregate prepared by fusing expandable beads comprising a microcapsule of a synthetic polymer and an expanding gas enclosed therein to each other by the expansion of the gas and has a bulk specific gravity of 0.05 to 0.15 g/cm.sup.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.